How to get data by using index numbers and store in new array?

Question

Shahab Khan 2018-12-4

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https://ww2.mathworks.cn/matlabcentral/answers/433843-how-to-get-data-by-using-index-numbers-and-store-in-new-array

回答： Shahab Khan 2018-12-4

采纳的回答： Shahab Khan

在 MATLAB Online 中打开

I have an array with some zeros and some positive numbers.

I already have a code which provide me index numbers of positive data location.

idx =
         141         212
         370         426
         608         642
         843         912
        1154        1177
        1481        1496
        1732        1779
        2128        2161
        2343        2377
        2578        2649
        2838        2908

Index number

141 to 212

has some positive valued which sum is equal to 50.

What I want to do is to sum up data between each index number calculated early and store it in a new array.

Expected result should be like

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Answer 1

Shahab Khan 2018-12-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/433843-how-to-get-data-by-using-index-numbers-and-store-in-new-array#answer_350559

在 MATLAB Online 中打开

Actually I manage to figure it out.

Here is solution, thought may be helpful for some others.

% idx is an array having index numbers
Result = zeros(length(idx),1);  % define size of result
for i= 1:length(idx)
data  = EnergyB((idx(i,1)):idx(i,2));
Result(k) = sum(data/3.6/1000000)  % use 3.6/1000000 for converting joules to kWh